import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';

import Stats from 'three/addons/libs/stats.module.js';

import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/addons/controls/OrbitControls0.js';
import { OBJLoader } from 'three/addons/loaders/OBJLoader.js';
var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {

    let stats;
    let camera, scene, renderer, controls;

    const settings = {
      metalness: 1.0,
      roughness: 0.4,
      ambientIntensity: 0.2,
      aoMapIntensity: 1.0,
      envMapIntensity: 1.0,
      displacementScale: 2.436143, // from original model
      normalScale: 1.0
    };

    let mesh, material;

    let pointLight, ambientLight;

    const height = 500; // of camera frustum

    let r = 0.0;

    init();
    animate();
    initGui();

    // Init gui
    function initGui() {

      const gui = new GUI();
      //let gui = gui.addFolder( "Material" );
      gui.add( settings, 'metalness' ).min( 0 ).max( 1 ).onChange( function ( value ) {

        material.metalness = value;

      } );

      gui.add( settings, 'roughness' ).min( 0 ).max( 1 ).onChange( function ( value ) {

        material.roughness = value;

      } );

      gui.add( settings, 'aoMapIntensity' ).min( 0 ).max( 1 ).onChange( function ( value ) {

        material.aoMapIntensity = value;

      } );

      gui.add( settings, 'ambientIntensity' ).min( 0 ).max( 1 ).onChange( function ( value ) {

        ambientLight.intensity = value;

      } );

      gui.add( settings, 'envMapIntensity' ).min( 0 ).max( 3 ).onChange( function ( value ) {

        material.envMapIntensity = value;

      } );

      gui.add( settings, 'displacementScale' ).min( 0 ).max( 3.0 ).onChange( function ( value ) {

        material.displacementScale = value;

      } );

      gui.add( settings, 'normalScale' ).min( - 1 ).max( 1 ).onChange( function ( value ) {

        material.normalScale.set( 1, - 1 ).multiplyScalar( value );

      } );

    }

    function init() {

      const container = document.createElement( 'div' );
      document.body.appendChild( container );

      renderer = new THREE.WebGLRenderer();
      renderer.setPixelRatio( window.devicePixelRatio );
      renderer.setSize( window.innerWidth, window.innerHeight );
      container.appendChild( renderer.domElement );

      //

      scene = new THREE.Scene();

      const aspect = window.innerWidth / window.innerHeight;
      camera = new THREE.OrthographicCamera( - height * aspect, height * aspect, height, - height, 1, 10000 );
      camera.position.z = 1500;
      scene.add( camera );

      controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
      controls.enableZoom = false;
      controls.enableDamping = true;

      // lights

      ambientLight = new THREE.AmbientLight( 0xffffff, settings.ambientIntensity );
      scene.add( ambientLight );

      pointLight = new THREE.PointLight( 0xff0000, 1.5, 0, 0 );
      pointLight.position.z = 2500;
      scene.add( pointLight );

      const pointLight2 = new THREE.PointLight( 0xff6666, 3, 0, 0 );
      camera.add( pointLight2 );

      const pointLight3 = new THREE.PointLight( 0x0000ff, 1.5, 0, 0 );
      pointLight3.position.x = - 1000;
      pointLight3.position.z = 1000;
      scene.add( pointLight3 );

      // env map

      const path = 'textures/cube/SwedishRoyalCastle/';
      const format = '.jpg';
      const urls = [
        path + 'px' + format, path + 'nx' + format,
        path + 'py' + format, path + 'ny' + format,
        path + 'pz' + format, path + 'nz' + format
      ];

      const reflectionCube = new THREE.CubeTextureLoader().load( urls );

      // textures

      const textureLoader = new THREE.TextureLoader();
      const normalMap = textureLoader.load( 'models/obj/ninja/normal.png' );
      const aoMap = textureLoader.load( 'models/obj/ninja/ao.jpg' );
      const displacementMap = textureLoader.load( 'models/obj/ninja/displacement.jpg' );

      // material

      material = new THREE.MeshStandardMaterial( {

        color: 0xc1c1c1,
        roughness: settings.roughness,
        metalness: settings.metalness,

        normalMap: normalMap,
        normalScale: new THREE.Vector2( 1, - 1 ), // why does the normal map require negation in this case?

        aoMap: aoMap,
        aoMapIntensity: 1,

        displacementMap: displacementMap,
        displacementScale: settings.displacementScale,
        displacementBias: - 0.428408, // from original model

        envMap: reflectionCube,
        envMapIntensity: settings.envMapIntensity,

        side: THREE.DoubleSide

      } );

      //

      const loader = new OBJLoader();
      loader.load( 'models/obj/ninja/ninjaHead_Low.obj', function ( group ) {

        const geometry = group.children[ 0 ].geometry;
        geometry.center();

        mesh = new THREE.Mesh( geometry, material );
        mesh.scale.multiplyScalar( 25 );
        scene.add( mesh );

      } );

      //

      stats = new Stats();
      container.appendChild( stats.dom );

      //

      window.addEventListener( 'resize', onWindowResize );

    }

    function onWindowResize() {

      const aspect = window.innerWidth / window.innerHeight;

      camera.left = - height * aspect;
      camera.right = height * aspect;
      camera.top = height;
      camera.bottom = - height;

      camera.updateProjectionMatrix();

      renderer.setSize( window.innerWidth, window.innerHeight );

    }

    //

    function animate() {

      requestId = requestAnimationFrame( animate );

      controls.update();

      stats.begin();
      render();
      stats.end();

    }

    function render() {

      pointLight.position.x = 2500 * Math.cos( r );
      pointLight.position.z = 2500 * Math.sin( r );

      r += 0.01;

      renderer.render( scene, camera );

    }
  }
})